.con_panel {
    position: relative;
    padding: 10px;
    margin-bottom: 15px;
    border-radius: 0px;
    border: 1px solid #00deff;
    margin-bottom: 10px;
    background: linear-gradient(to left, #8bc1ed, #8bc1ed) left top no-repeat, linear-gradient(to bottom, #8bc1ed, #8bc1ed) left top no-repeat, linear-gradient(to left, #8bc1ed, #8bc1ed) right top no-repeat, linear-gradient(to bottom, #8bc1ed, #8bc1ed) right top no-repeat, linear-gradient(to left, #8bc1ed, #8bc1ed) left bottom no-repeat, linear-gradient(to bottom, #8bc1ed, #8bc1ed) left bottom no-repeat, linear-gradient(to left, #8bc1ed, #8bc1ed) right bottom no-repeat, linear-gradient(to left, #8bc1ed, #8bc1ed) right bottom no-repeat;
    background-size: 2px 9px, 9px 2px, 2px 9px, 9px 2px;
}